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One can calculate the 95% confidence interval for the mean with the population standard deviation known. This will give us an upper and a lower confidence limit. What happens if we decide to calculate the 99% confidence interval? Describe how the increase in the confidence level has changed the width of the confidence interval. Do the same for the confidence interval set at 80%. Include an example with actual numerical values for the intervals in your post to help with your explanations.

Experimental versus Non-experimental Quantitative Research [WLOs: 1, 2, 3] [CLOs: 3, 4, 5] To prepare for this discussion, read the instructor guidance, and Sections 2.2, 2.3, 2.4, 3.3, “Steps” in Section 3.4, 3.5, 4.3, and Chapter 5 of the Newman (2016) textbook.In contrast to qualitative designs, which are all basically non-experimental and descriptive, quantitative research designs may be either experimental or non-experimental. Within the non-experimental category, descriptive and correlational research are sub-categories.Using the Ashford University Library databases, look for a scholarly/peer-reviewed quantitative research study on the topic you selected in Week 1. In your initial post, Appraise the differences between experimental and non-experimental research. Differentiate between a correlational study and an experimental study. State the hypothesis being tested in the selected quantitative research study. Identify the major variables and categorize them as independent or dependent. Describe the methods and results of the study. Determine whether the study is descriptive, correlational, or experimental, and explain why it fits this classification. Document your sources in APA style (Links to an external site.)Links to an external site., with in-text citations and references listed at the end of the post. For additional guidance see the Citing Within Your Paper (Links to an external site.)Links to an external site. and Formatting Your References List (Links to an external site.)Links to an external site. resources from the Ashford Writing Center.